Residents of Harris County and surrounding areas now have and easy way to assess flood potential near them in near real time. It’s called the Harris County Flood Warning System website. It offers near-real-time information from 100+ gages on major streams and rivers throughout the entire region.
Below, you can see part of the welcome screen, zoomed into the North Houston area. It shows the amount of rainfall at each gage.
Most of north Harris County received less than an inch of rainfall yesterday. However, areas to the west, north, and south received up to three inches. Areas upstream from Kingwood received five to six times more rainfall that the Lake Houston Area.
Rainfall patterns like that can lull people into a false sense of security because flooding originates upstream and works its way down.
Given the severity of yesterday’s storms, several people asked last night and this morning, “What is the potential for flooding?” The Harris County Flood Warning System provides answers. Here’s how to use it for maximum effect.
Customized Alerts from Flood Warning System
First, note that The Flood Warning System allows you to create an account and customize alerts. While not necessary, it helps reduce extraneous information in emergencies, so you only receive messages that affect you.
For instance, the San Jacinto West Fork, Spring Creek and Cypress Creek affect those living in the Humble/Kingwood area. All three converge just west of the US59 bridge. So you could sign up for alerts only from gages in those areas.
Data-Driven Mapping System
Note that the Flood Warning System lets you select several map view options to help you understand conditions near you as well as upstream. For instance, if you click “Watersheds” and “Channel Status,” you can see:
Which watershed you live in
The near-real-time status of gages in that area
Where flood danger or possible flooding exists
Harris County Flood Warning System as of 5/28/2020, 11am.With Channel Status and Watershed options selected.
Drilling Down to Areas of Interest
From there, you can click on gages of interest. The green squares indicate “no flooding danger.” The yellow triangles mean “potential danger.” Red means “flooding.”
So, clicking on the yellow triangle by Shenandoah in the Spring Creek Watershed lets me investigate what’s happening at that gage. See below.
Source: Harris County Flood Warning System at 11:13 a.m. on 5/28/2020.
From this information, I can see that the channel is higher than normal, but still well within its banks. The top of bank (TOB) is at 156.26 feet. But the current water level is only at 154.33 feet. More important, I can see from the graph that the water level has peaked and is trending down.
With all other reporting stations in my watershed showing “green,” I can breath easy. Unless we get major rainfall upstream this afternoon. After all, this creek rose 3.5 feet yesterday after receiving about 2 inches of rain upstream. Today, soils are highly saturated and the creek is only about 2 feet from coming out of its banks. Another two inches of rain could cause flooding. (See forecast at bottom of this post.)
Other Valuable Features
Among other features, Harris County’s Flood Warning System offers:
Historical data so that you can compare current water level data to past floods that may have threatened your home.
Rainfall alarms that tell you when particularly heavy downpours have occurred near you that could trigger street or stream flooding.
Inundation mapping that shows the extent of flooding during flood events.
Color-coded channel status maps to show you at a glance where streams are flooding
Links to weather alerts
All in all, Harris County Flood Control District has built a powerful tool with its Flood Warning System. It’s intuitive, uncluttered and easy to use, giving you the information you need, when you need it, where you need it, in the form you need it.
It’s fun to explore all the options. If it rains again this afternoon, use the opportunity to teach your family how to use it.
With the information on this web site, Lake Houston Area residents who flooded during Harvey could have seen the 80,000 cubic feet per second released from Lake Conroe barreling down the West Fork toward them…despite the breakdown in the emergency warning system. They could have evacuated sooner. They could have saved vehicles, valuables, and in some cases even lives.
Everyone should become familiar with the Flood Warning System, learn how to use it and bookmark it. If I were a science teacher in this area, learning how to use this site would become part of my curriculum.
Unsettled Weather Continues Today
Chances of additional heavy rainfall in the Lake Houston Area are lower today than yesterday. However, potential for scattered thunderstorms by early afternoon remains, according to Jeff Lindner, Harris County meteorologist.
Lindner adds, “…given the developing instability and cold air aloft, large hail and gusty winds are possible. NOAA’s Storm Prediction Center (SPC) does have nearly all of the area in a “marginal” risk for severe storms this afternoon with a higher threat to our west across southwest and south central TX.”
It will be hard to predict the exact location of these storms, says Lindner. “We could see some additional very heavy rainfall with the storms this afternoon (1-2 inches) in an hour or less. And while grounds are becoming saturated from all the recent rain, only street flooding is expected.”
“With that said, upper Spring and upper Little Cypress Creeks are elevated and should heavy rains impact NW Harris County, there could be some minor lowland flooding along the headwaters of those channels.”
“Upper level high pressure begins to build into the area Friday and will gain a foothold over the region this weekend into next week. Expect rain chances to taper back to only 10-20%. We can probably cut chances completely by Sunday,” says Lindner.
Posted by Bob Rehak on 5/28/2020
1003 Days since Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2020/05/Channel-Status-5.28.jpg?fit=1500%2C906&ssl=19061500adminadmin2020-05-28 13:36:092020-05-28 13:47:23Easy Way to Assess Your Flood Potential in Near Real Time
My phone has blown up with unexpected severe storm warnings in the last hour. A line of strong thunderstorms is racing toward Southeast Texas and the Houston region.
For your protection, they advise moving to an interior room on the lowest floor of the building you are in. Put cars in a garage if you can.
People in the affected area are urged to seek shelter immediately in an interior room without windows and on the lowest floor of a building. People should bring their pets inside and delay travel or outdoor activities until the storm passes. If travel is unavoidable, reduce your speed to avoid hydroplaning. Heavy rains may also impact the area and only a few inches of water can float a vehicle. When you see water covering the road, Turn Around, Don’t Drown®.
Radar from IAH as of 3:39
The immediate danger as of 3:49 pm is in Waller and Montgomery counties. The watch lasts until 9PM or until cancelled. The NWS cancelled a tornado watch associated with this storm at 3:45 PM.
Jeff Lindner, Harris County Flood Control meteorologist, predicts, “This should be the final round of weather associated with this slow moving upper level low as high pressure begins to build over the area Friday into the weekend.”
Posted by Bob Rehak based on NWS warning on 5/27/2020 at 3:55 PM
1002 Days since Hurricane Harvey
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2020/05/Attachment-1.png?fit=1242%2C2454&ssl=124541242adminadmin2020-05-27 15:56:062020-05-27 16:21:58Keep Eyes on the Skies: Severe Storm Warning Through Tonight
When the developer sought approval of their general plan from the City of Houston Planning Commission, the City deferred approval. Instead they asked the developer to consult with the City Engineer and Harris County Flood Control, before coming back to the commission.
Despite the location of the development in the floodplain and floodway of the West Fork, ironically, the City had only procedural comments on the plans. The comments had to do with things like the spacing and labelling of streets. Incredibly, they did not refer to potential flooding or wetlands issues.
Pending Regulation Changes Could Affect Development
Specifically, the County wants the City to change Article III: Standards for Flood Hazard Reduction in the Houston Code of Ordinances, Chapter 19 Floodplain (September 2018):
19-33(a) Base Flood Elevation Requirements –Must also include a provision that no fill will be allowed to elevate structures proposed for the 100-year floodplain. These structures must be on open foundations designed by a structural engineer.
Where Property Is
Here’s where the property is. It wraps around the Barrington, which was elevated significantly and still flooded during Harvey. It also wraps around River Grove Park Kingwood Country Club, and Deer Ridge Park.
Purple area represents proposed site of Romerica’s Orchard Seeded Ranches Development.
Large Concentration of Forested Wetlands
All aerial photos below were taken on 5/11/2020.
Looking southeast from the southwest corner of Romerica’s property. Hamblen Road enters the from on the middle right. That’s the San Jacinto West Fork cutting through the top of the frame.Looking southeast while hovering over Woodland Hills Drive. The northern part of Romerica’s property lies between the front and back nines of the Kingwood Country Club Lake Course. That’s the Barrington on the right.Those same trees serve as a nesting ground for hundreds of great egrets.Looking southwest from near the entrance from Barrington. Deer Ridge Park wraps around the water tower.Looking SE over Woodland Hills and the Barrington entrance. The property contains three artificial lakes, which I believe were excavated to elevate the Barrington.Note how high lake level/water table is. River Grove soccer fields are on right. Look closely and you can also see the Kingwood Diversion Ditch entering the park from the lower right.
From the ground, beneath the dense canopy of trees, you can see palmettos galore. Palmetto plants are an important biologic indicator of wetlands. They only grow where the ground is underwater at least part of the year.
“Wetlands function as natural sponges that trap and slowly release surface water, rain, … and flood waters. Trees, root mats and other wetland vegetation also slow the speed of flood waters and distribute them more slowly over the floodplain. This combined water storage an braking action lowers flood heights and reduces erosion,” says the Agency.
They continue: “Wetlands within and downstream of urban areas are particularly valuable, counteracting the greatly increased rate and volume of surface- water runoff from pavement and buildings. The holding capacity of wetlands helps control floods… Preserving and restoring wetlands together with other water retention can often provide the level of flood control otherwise provided by expensive dredge operations and levees. The bottomland hardwood- riparian wetlands along the Mississippi River once stored at least 60 days of floodwater. Now they store only 12 days because most have been filled or drained.”
Fence separating Romerica property from Hamblen road after Harvey.
All those concerns still exist. Romerica should take a cue from the Humble ISD. They’ve had two ag barns in this area. The District abandoned one (that was actually on Romerica property), moved to higher ground, is trying to abandon the second, and hopes to move to higher ground yet again.
The thoughts expressed in this post represent opinions on matters of public concern and safety. They are protected by the First Amendment of the US Constitution and the Anti-SLAPP Statute of the Great State of Texas.
https://i0.wp.com/reduceflooding.com/wp-content/uploads/2020/05/20200511-RJR_2403.jpg?fit=1200%2C800&ssl=18001200adminadmin2020-05-27 15:05:412020-05-27 15:15:06Development Watch List: Orchard Seeded Ranches From the Air
Easy Way to Assess Your Flood Potential in Near Real Time
Residents of Harris County and surrounding areas now have and easy way to assess flood potential near them in near real time. It’s called the Harris County Flood Warning System website. It offers near-real-time information from 100+ gages on major streams and rivers throughout the entire region.
Below, you can see part of the welcome screen, zoomed into the North Houston area. It shows the amount of rainfall at each gage.
Most of north Harris County received less than an inch of rainfall yesterday. However, areas to the west, north, and south received up to three inches. Areas upstream from Kingwood received five to six times more rainfall that the Lake Houston Area.
Rainfall patterns like that can lull people into a false sense of security because flooding originates upstream and works its way down.
Given the severity of yesterday’s storms, several people asked last night and this morning, “What is the potential for flooding?” The Harris County Flood Warning System provides answers. Here’s how to use it for maximum effect.
Customized Alerts from Flood Warning System
First, note that The Flood Warning System allows you to create an account and customize alerts. While not necessary, it helps reduce extraneous information in emergencies, so you only receive messages that affect you.
For instance, the San Jacinto West Fork, Spring Creek and Cypress Creek affect those living in the Humble/Kingwood area. All three converge just west of the US59 bridge. So you could sign up for alerts only from gages in those areas.
Data-Driven Mapping System
Note that the Flood Warning System lets you select several map view options to help you understand conditions near you as well as upstream. For instance, if you click “Watersheds” and “Channel Status,” you can see:
Drilling Down to Areas of Interest
From there, you can click on gages of interest. The green squares indicate “no flooding danger.” The yellow triangles mean “potential danger.” Red means “flooding.”
So, clicking on the yellow triangle by Shenandoah in the Spring Creek Watershed lets me investigate what’s happening at that gage. See below.
From this information, I can see that the channel is higher than normal, but still well within its banks. The top of bank (TOB) is at 156.26 feet. But the current water level is only at 154.33 feet. More important, I can see from the graph that the water level has peaked and is trending down.
With all other reporting stations in my watershed showing “green,” I can breath easy. Unless we get major rainfall upstream this afternoon. After all, this creek rose 3.5 feet yesterday after receiving about 2 inches of rain upstream. Today, soils are highly saturated and the creek is only about 2 feet from coming out of its banks. Another two inches of rain could cause flooding. (See forecast at bottom of this post.)
Other Valuable Features
Among other features, Harris County’s Flood Warning System offers:
All in all, Harris County Flood Control District has built a powerful tool with its Flood Warning System. It’s intuitive, uncluttered and easy to use, giving you the information you need, when you need it, where you need it, in the form you need it.
It’s fun to explore all the options. If it rains again this afternoon, use the opportunity to teach your family how to use it.
With the information on this web site, Lake Houston Area residents who flooded during Harvey could have seen the 80,000 cubic feet per second released from Lake Conroe barreling down the West Fork toward them…despite the breakdown in the emergency warning system. They could have evacuated sooner. They could have saved vehicles, valuables, and in some cases even lives.
Everyone should become familiar with the Flood Warning System, learn how to use it and bookmark it. If I were a science teacher in this area, learning how to use this site would become part of my curriculum.
Unsettled Weather Continues Today
Chances of additional heavy rainfall in the Lake Houston Area are lower today than yesterday. However, potential for scattered thunderstorms by early afternoon remains, according to Jeff Lindner, Harris County meteorologist.
Lindner adds, “…given the developing instability and cold air aloft, large hail and gusty winds are possible. NOAA’s Storm Prediction Center (SPC) does have nearly all of the area in a “marginal” risk for severe storms this afternoon with a higher threat to our west across southwest and south central TX.”
It will be hard to predict the exact location of these storms, says Lindner. “We could see some additional very heavy rainfall with the storms this afternoon (1-2 inches) in an hour or less. And while grounds are becoming saturated from all the recent rain, only street flooding is expected.”
“With that said, upper Spring and upper Little Cypress Creeks are elevated and should heavy rains impact NW Harris County, there could be some minor lowland flooding along the headwaters of those channels.”
“Upper level high pressure begins to build into the area Friday and will gain a foothold over the region this weekend into next week. Expect rain chances to taper back to only 10-20%. We can probably cut chances completely by Sunday,” says Lindner.
Posted by Bob Rehak on 5/28/2020
1003 Days since Hurricane Harvey
Keep Eyes on the Skies: Severe Storm Warning Through Tonight
My phone has blown up with unexpected severe storm warnings in the last hour. A line of strong thunderstorms is racing toward Southeast Texas and the Houston region.
National Weather Service lists the main threats as:
Protective Actions
For your protection, they advise moving to an interior room on the lowest floor of the building you are in. Put cars in a garage if you can.
People in the affected area are urged to seek shelter immediately in an interior room without windows and on the lowest floor of a building. People should bring their pets inside and delay travel or outdoor activities until the storm passes. If travel is unavoidable, reduce your speed to avoid hydroplaning. Heavy rains may also impact the area and only a few inches of water can float a vehicle. When you see water covering the road, Turn Around, Don’t Drown®.
The immediate danger as of 3:49 pm is in Waller and Montgomery counties. The watch lasts until 9PM or until cancelled. The NWS cancelled a tornado watch associated with this storm at 3:45 PM.
Jeff Lindner, Harris County Flood Control meteorologist, predicts, “This should be the final round of weather associated with this slow moving upper level low as high pressure begins to build over the area Friday into the weekend.”
Posted by Bob Rehak based on NWS warning on 5/27/2020 at 3:55 PM
1002 Days since Hurricane Harvey
Development Watch List: Orchard Seeded Ranches From the Air
The Romerica high-rise project near the floodway of the San Jacinto West Fork was reborn recently as Orchard Seeded Ranches. Same property. Same developer. Undisclosed concept as of this date.
When the developer sought approval of their general plan from the City of Houston Planning Commission, the City deferred approval. Instead they asked the developer to consult with the City Engineer and Harris County Flood Control, before coming back to the commission.
Despite the location of the development in the floodplain and floodway of the West Fork, ironically, the City had only procedural comments on the plans. The comments had to do with things like the spacing and labelling of streets. Incredibly, they did not refer to potential flooding or wetlands issues.
Pending Regulation Changes Could Affect Development
However, regulation changes are pending. Harris County has made adoption of its Atlas-14-based stormwater design and floodplain standards a condition of participating in all flood bond projects. Those standards would require elevation of any homes built on the Romerica property. In practical terms, that means building on stilts. And that, in turn, means dollars.
Specifically, the County wants the City to change Article III: Standards for Flood Hazard Reduction in the Houston Code of Ordinances, Chapter 19 Floodplain (September 2018):
Where Property Is
Here’s where the property is. It wraps around the Barrington, which was elevated significantly and still flooded during Harvey. It also wraps around River Grove Park Kingwood Country Club, and Deer Ridge Park.
Large Concentration of Forested Wetlands
All aerial photos below were taken on 5/11/2020.
From the ground, beneath the dense canopy of trees, you can see palmettos galore. Palmetto plants are an important biologic indicator of wetlands. They only grow where the ground is underwater at least part of the year.
Role of Wetlands in Reducing Flooding
The EPA cites flood protection as one of the primary benefits of wetlands.
“Wetlands function as natural sponges that trap and slowly release surface water, rain, … and flood waters. Trees, root mats and other wetland vegetation also slow the speed of flood waters and distribute them more slowly over the floodplain. This combined water storage an braking action lowers flood heights and reduces erosion,” says the Agency.
They continue: “Wetlands within and downstream of urban areas are particularly valuable, counteracting the greatly increased rate and volume of surface- water runoff from pavement and buildings. The holding capacity of wetlands helps control floods… Preserving and restoring wetlands together with other water retention can often provide the level of flood control otherwise provided by expensive dredge operations and levees. The bottomland hardwood- riparian wetlands along the Mississippi River once stored at least 60 days of floodwater. Now they store only 12 days because most have been filled or drained.”
Reasons Romerica Application Previously Withdrawn
Last year, when Romerica tried to develop this area as condos and high rises, they ran into protests from US Fish and Wildlife Service, the Army Corps, environmental groups, and the Kingwood community. Major concerns included the filling of wetlands, nesting bald eagles, river migration, flood dangers to residents, and lack of evacuation routes.
All those concerns still exist. Romerica should take a cue from the Humble ISD. They’ve had two ag barns in this area. The District abandoned one (that was actually on Romerica property), moved to higher ground, is trying to abandon the second, and hopes to move to higher ground yet again.
As of this writing, Romerica has not yet reapplied to the City Planning Commission. Nor has the City adopted all of the County’s Atlas-14 regulations.
Posted by Bob Rehak on 5/27/2020
1002 Days after Hurricane Harvey
The thoughts expressed in this post represent opinions on matters of public concern and safety. They are protected by the First Amendment of the US Constitution and the Anti-SLAPP Statute of the Great State of Texas.